Photoshop win10 freezing, only alt+tab makes it work back

Hello I recently bought an annual subscription for PS (i had a student version on an other pc before that).

Like said in the title, photoshop ofter freezes when I do some repeated actions (like ctrl+z, brush, color picker, etc...). The only way to make it unfreeze in this case is to switch window and come back on PS. The actions I did when it's freezing are memorized and are applied (with some latency) when I come back on PS.

That issue was firstly occasional and gradually got more and more frequent. It's worse and worse and now it's totally getting counterproductive (every 5 actions or so).

Photoshop also indefinitely freezes in some rare cases (but i don't know if it's joined to my main issue).

I'm even thinking about buying a Mac just for work.

I checked many topics and found no solutions.

-I rebooted windows from scratch

-I checked every performance settings and optimized them

-I tried without using my graphic card (geforce 850m)

-I tried downgrading versions of PS

-I disabled "keyboard and handwriting panel service" in Administrator Tools

My PC is performant and works fine with EVERY applications exepct Photoshop.

There are my specs:

Hoping someone will help me.

Thank you very much